3m Innovative Properties Company

Hoechst Aktiengesellschaft

Other

Dyneon Gmbh

Hoechstaktiengesellschaft

The South African Nuclear Energy Corporation Limited

Hoechst Aktiengelselschaft

Werner Schwertfeger

Klaus Hintzer

Harald Kaspar

Tilman C Zipplies

Andreas R Maurer

Kai Helmut Lochhaas

Gunter Siegemund

Michael Jürgens

George G I Moore

Jay F Schulz

Hans Millauer

Peter Blickle

Richard M Flynn

Zai-Ming Qiu

Michael C Dadalas

Ludwig Mayer

Gernot L&ouml;hr

Herbert Koenigsmann

Egon Obermaier

Miguel Antonio Guerra

Werner M A Grootaert

Robert E Kolb

Gernot Löhr

Allan T Worm

Gerald Lee Bauer

Rudolf J Dams

Michael S Terrazas

Reinhard Albert Sulzbach

Gernot Loehr

Michael Juergens

Gernot Lohr

Erik D Hare

Bernhard Hirsch

Stephan F&uuml;hrer

Jeffrey D Weigelt

Arthur A Ponelis

Peter Bissinger

Heinz Strutz

Friedrich Kloos

Ralph Kaulbach

Markus E Hirschberg

Arne Thaler

Oleg Shyshkov

Albert Killich

Steffen Dapperheld

André Streiter

Friedhelm Gundert

Johannes Brandrup

Izak Jacobus Van Der Walt

Christopher L Gross

Alfred Kruse

Manfred Wildt

Dieter Ulmschneider

Franz Maerz

Rebekka Epsch

Hermann Blädel

Greta Dewitte

Hermann Bl&auml;del

Herbert Königsmann

Herbert Muffler

G/u/ Nter Siegemund

Astrid Weber

Kai Helmut Löchhaas

Stephan Führer

Michael Jurgens

Michael JÜRGENS

George GI Moore

Michael Jüergens

Robert Heinfeldner

Described herein are three methods for making halogenated fluorinated ether-containing compounds using a fluorinated olefin or hexafluoropropylene oxide.

Methods of making halogenated fluorinated ether-containing compounds

Compounds represented by formula (Rf-Q-X)&#x2014;Z. Each Rf is independently a partially fluorinated or fully fluorinated group selected from Rf-(O)&#x2014;CHF&#x2014;(CF)&#x2014;; [Rf-(O)C(L)H&#x2014;CF&#x2014;O]&#x2014;W&#x2014;; CFCFH&#x2014;O&#x2014;(CF)&#x2014;; CF&#x2014;(O&#x2014;CF)&#x2014;; and CF&#x2014;O&#x2014;(CF)&#x2014;O&#x2014;CF&#x2014;. Methods of reducing surface tension of a liquid, making foams, and treating a surface using the compounds are also disclosed.

Fluorinated ether compounds and methods of using the same

Method of making fluoropolymers by emulsion polymerization of one or more fluorinated monomers in an aqueous phase in the presence of a fluorinated emulsifier, said method comprises adding a doping agent in a weight ratio with respect to the emulsifier of from about 1:2 to about 1:20, said doping agent has a melting point of equal or less than 30&#xb0; C. and a boiling point of at least about 100&#xb0; C. and is selected from the group consisting of fluorinated cyclic hydrocarbons, fluorinated polyoxyalkenes, fluorinated alkenes and fluorinated polyoxyalkenes.

Method of preparing fluoropolymers by aqueous emulsion polymerization

A method of making a fluoropolymer dispersion by first providing a fluoropolymer dispersion comprising fluoropolymer particles and one or more fluorinated surfactants selected from fluorinated carboxylic acids or salts thereof having the general formula:[R&#x2014;O-L-COO]X&#x2003;&#x2003;(I)

Method of making fluoropolymer dispersion

A composition including at least one first divalent unit represented by formula: Each Rf is independently selected from the group consisting of Rf&#x2014;(O)&#x2014;CHF&#x2014;(CF)&#x2014;; [Rf&#x2014;(O)&#x2014;C(L)H&#x2014;CF&#x2014;O]&#x2014;W&#x2014;; RfO&#x2014;(CF); F(CF)&#x2014;(O&#x2014;CF2)&#x2014;O&#x2014;CF&#x2014;; and CF&#x2014;O&#x2014;(CF)&#x2014;(OCF(CF)&#x2014;CF)&#x2014;O-L-. Each Q is independently selected from the group consisting of a bond, &#x2014;C(O)&#x2014;N(R)&#x2014;, and &#x2014;C(O)&#x2014;O&#x2014;. Each X is independently selected from the group consisting of alkylene and arylalkylene, wherein alkylene and arylalkylene are each optionally interrupted by at least one ether linkage and optionally terminated by &#x2014;N(R)&#x2014;C(O)&#x2014; or &#x2014;O&#x2014;C(O)&#x2014;. R and Rare each independently selected from the group consisting of hydrogen and alkyl having from 1 to 4 carbon atoms. Rfrepresents a partially or fully fluorinated alkyl group having from 1 to 10 carbon atoms and optionally interrupted with at least one oxygen atom. Rfis selected from the group consisting of CFCFH&#x2014; and F(CF2)-. Methods of reducing surface tension of a liquid, making foams, and treating a surface using the compositions are also disclosed. 

Fluorinated ether compositions and methods of using the same

A method of making a fluoropolymer in the presence of a fluorinated surfactant.

Aqueous emulsion polymerization process for producing fluoropolymers

Provided are fluorinated oxy-carboxylic acids, derivatives of oxy-carboxylic acids, and methods of preparing oxy-carboxylic acids and derivatives thereof.

Fluorinated oxy-carboxylic acids, derivatives, and methods of preparation

A process comprising polymerizing tetrafluoroethylene in an aqueous emulsion in the presence of a non-telogenic surfactant having an anionic portion with the general formula (I):R&#x2014;O-L-CO&#x2014;&#x2003;&#x2003;(I)wherein Ris selected from a partially fluorinated alkyl group, a perfluorinated alkyl group, a partially fluorinated alkyl group interrupted by one or more oxygen atoms, and a perfluorinated alkyl group interrupted by one or more oxygen atoms, wherein Rhas from 1 to 10 carbon atoms; and L is an alkylene group having the general formula (CX)wherein each X is independently selected from R, fluorine, and hydrogen and n is selected from 1 to 5, with the proviso that the surfactant contains at least one unit selected from a &#x2014;CH&#x2014; unit and a &#x2014;CHF&#x2014; unit. Also provided are aqueous dispersions comprising these surfactants and methods of coating substrates with the aqueous dispersions.

Explosion taming surfactants for the production of perfluoropolymers

The invention provides a fluorinated surfactant having the general formula:[R&#x2014;(O)&#x2014;CHF&#x2014;(CF)&#x2014;COO&#x2014;]X&#x2003;&#x2003;(I)wherein Rrepresents a partially or fully fluorinated aliphatic group optionally interrupted with one or more oxygen atoms, t is 0 or 1 and n is 0 or 1, Xrepresents a cation having a valence i and i is 1, 2 or 3. The surfactant can be used in emulsion polymerization of fluoromonomers to prepare fluoropolymers.

Fluorinated surfactants for making fluoropolymers

The invention provides a method for recovery of a fluorinated anionic surfactant from a basic anion exchange resin having quaternary ammonium groups, the method comprising eluting the anion exchange resin with a composition comprising an ammonium salt and a water miscible organic solvent. The method according to the invention may provide one or more of the following advantages. For example, the method can be designed to allow for recovery of substantially all of the fluorinated surfactant from a basic anion exchange resin having quaternary ammonium groups. Also, the liquid used for recovering the surfactant from the anion exchange resin is a simple liquid that can be readily and cost effectively manufactured. Further the process may be carried out in a convenient and easy manner. Furthermore, the method generally does not require large amounts of the eluting composition.

Recovery of fluorinated surfactants from a basic anion exchange resin having quaternary ammonium groups

A method for removing a fluorinated carboxylic acid or salt thereof from an aqueous liquid by contacting the aqueous liquid with adsorbent particles. The fluorinated carboxylic acid or salt thereof is selected from the group consisting of partially fluorinated carboxylic acids or salts thereof and fully fluorinated carboxylic acids or salts thereof.

Method of removing fluorinated carboxylic acid from aqueous liquid

The present invention provides an aqueous emulsion polymerization of fluorinated monomers including gaseous fluorinated monomers using a perfluoro ether surfactant as an emulsifier. The perfluoro ether surfactants correspond to formula (I)R&#x2014;O&#x2014;CFCF&#x2014;X&#x2003;&#x2003;(I)wherein Rrepresents a linear or branched perfluoroalkyl group having 1, 2, 3 or 4 carbon atoms and X represents a carboxylic acid group or salt thereof. In a further aspect, the invention also provides an aqueous fluoropolymer dispersion comprising the perfluoro ether surfactant and the use of such dispersion in the coating or impregnation of substrates.

Aqueous emulsion polymerization of fluorinated monomers using a fluorinated surfactant

A coating composition having (i) an aqueous dispersion of fluoropolymer particles comprising a non-melt processible polymer of tetrafluoroethylene, (ii) a fluorinated surfactant, (iii) a non-ionic non-fluorinated surfactant and (iv) a non-fluorinated polymer, wherein the fluorinated surfactant is selected from fluorinated carboxylic acids or salts thereof of the general formula (I):[R&#x2014;O-L-COO]X&#x2003;&#x2003;(I)wherein L represents a linear partially or fully fluorinated alkylene group or an aliphatic hydrocarbon group, Rrepresents a linear partially or fully fluorinated aliphatic group or a linear partially or fully fluorinated aliphatic group interrupted with one or more oxygen atoms, Xrepresents a cation having the valence i and i is 1, 2 or 3.

Coating composition

The present invention provides a method of recovering a fluorinated acid surfactant or salt thereof from adsorbent particles to which said fluorinated acid surfactant has been adsorbed. The method comprises mixing adsorbent particles having adsorbed fluorinated acid surfactant or salt thereof with an alcohol and optionally an acid. The mixture is generally heated to cause esterification of the fluorinated acid surfactant or salt thereof with the alcohol so as to form an ester derivative of the fluorinated acid surfactant, distilling the mixture to form a distillate comprising the ester derivative, separating the ester derivative from the distillate and optionally feeding the remainder of the distillate back into the mixture.

Method of recovering fluorinated acid surfactants from adsorbent particles loaded therewith

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Altoetting, Germany

Werner Schwertfeger